[1] She is co-founder of Prospect Park Productions, an organisation aiming “to create and produce original New Zealand theatre and collaborative projects that reach into other art forms.
She studied acting at the Lee Strasberg Theatre Institute and at the Royal Academy of Dramatic Art summer school.
[7] In her Landfall review of the anthology, Helen Watson White called attention to the “atmosphere of emotional unease” in Duncan's play and appreciated the work for being “simple, direct, and chillingly plausible.
Prospect Park has overseen recent productions of many of Duncan's plays, as well as the three-part podcast Dark Dunedin: Heaven Looks On.
[13] In 2020, Duncan won the Bruce Mason Playwriting Award for her "sharp, sophisticated, passionate, quirky, evocative and unsettling" writing.